40 Words That Start With X

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arthobbit/iStock via Getty Images

When the lexicographer Dr. Samuel Johnson put together his Dictionary of the English Language in 1755, there weren't a lot of words that started with X; he even included a disclaimer at the bottom of page 2308 that read, “X is a letter which though found in Saxon words, begins no word in the English language.” Noah Webster went one better when he published his Compendious Dictionary in 1806 that included a single X-word, xebec, defined as “a small three-masted vessel in the Mediterranean Sea.” Although, by the time he compiled his landmark American Dictionary in 1828, that total had risen to 13.

X has never been a common initial letter in English, and even with today’s enormous vocabulary you can still only expect around 0.02 percent of the words in a dictionary to be listed under it. But why not try boosting your vocabulary with these 40 words that start with X.

1. X

On its own, the letter X is listed in the Oxford English Dictionary as a verb meaning “to cross out a single letter of type.” X. X. in Victorian slang meant “double-excellent,” while X. X. X. described anything that was “treble excellent.”

2. XANTHIPPE

Xanthippe was the name of Socrates’ wife, who, thanks to a number of Ancient Greek caricatures, had a reputation for henpecking, overbearing behavior. Consequently her name can be used as a byword for any ill-tempered or cantankerous woman or wife—as used in Shakespeare’s Taming of the Shrew.

3. XANTHOCOMIC

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Xanthos was the Ancient Greek word for yellow, and as such is the root of a number of mainly scientific words referring to yellow-colored things. So, if you’re xanthocomic, you have yellow hair; if you’re xanthocroic you have fair hair and pale skin; and if you’re xanthodontous, you have yellow teeth.

4. X-CATCHER

In old naval slang, an X-catcher or X-chaser was someone who was good at math—literally someone good at working out the value of x.

5. X-DIVISION

Victorian slang for criminals or pickpockets, or people who make a living by some underhand means.

6. X-DOUBLE-MINUS

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1960s slang for something really, really terrible.

7. XENAGOGUE

Derived from the same root as xenophobia, a xenagogue is someone whose job it is to conduct strangers or to act as a guide while…

8. XENAGOGY

… a xenagogy is a guidebook.

9. XENIAL

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The adjective xenial is used to describe a friendly relationship between two parties, in particular between a hospitable host and his or her guests, or diplomatically between two countries.

10. XENIATROPHOBIA

Don’t like going to see doctors you don’t know? Then you’re xeniatrophobic.

11. XENIUM

A xenium is a gift or offering given to a stranger, which in its native Ancient Greece would once have been a lavish feast or a refreshing spread of food and fruit. In the 19th century art world, however, xenium came to refer to a still-life painting depicting something like a extravagant display of food or a bowl of fruit.

12. XENIZATION

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A 19th century word meaning “the act of traveling as a stranger.”

13. XENOCRACY

A government formed by foreigners or outsiders is a xenocracy. A member of one is a xenocrat.

14. XENODOCHEIONOLOGY

Defined as “the lore of hotels and inns” by Merriam-Webster.

15. XENODOCHIUM

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A guesthouse or hostel, or any similar stopping place for travelers or pilgrims.

16. XENODOCHY

A 17th century word for hospitality. If you’re xenodochial then you like to entertain strangers.

17. XENOGLOSSY

The ability to speak a language that you’ve apparently never learnt.

18. XENOLOGY

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The scientific study of extraterrestrial phenomena is xenology. The study of extraterrestrial life forms is xenobiology.

19. XENOMANIA

The opposite of xenophobia is xenomania or xenophilia, namely an intense enthusiasm or fondness for anything or anyone foreign.

20. XENOMORPH

Something unusually or irregularly shaped is a xenomorph—which is why it’s become another name for the eponymous creature in the Alien film franchise.

21. XENOTRANSPLANTATION

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Transplanting organic matter from a non-human into a human (like a pig’s heart valve into a human heart) is called xenotransplantation. Whatever it is that’s transplanted is called the xenograft.

22. XERIC

An ecological term used to describe anywhere extremely dry or arid. If it’s xerothermic, then it’s both dry and hot.

23. XERISCAPE

If you live in a xeric area, then you’ll have to xeriscape your garden. It’s the deliberate use of plants that need relatively little moisture or irrigation to landscape an arid location.

24. XEROCHILIA

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The medical name for having dry lips. Having a dry mouth is xerostomia.

25. XEROCOPY

A xerographic copy of a document—or, to put it another way, a photocopy.

26. XEROPHAGY

The eating of dry food is xerophagy. It mightn’t sound like it, but it was originally a religious term.

27. XESTURGY

The proper name for the process of polishing.

28. XILINOUS

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Something described as xilinous resembles or feels like cotton …

29. XIPHOID

… while something described as xiphoid resembles a sword.

30. XOANON

Derived from the Greek for “carve” or “scrape,” a xoanon is a carved idol of a deity.

31. XTAL

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An abbreviation of “crystal,” according to the OED.

32. XYLOGRAPHER

A 19th century word for a wood engraver.

33. XYLOID

Why say that something is “woody” when you can say that it’s xyloid?

34. XYLOPOLIST

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A 17th century formal name for a timber merchant.

35. XYLOTOMOUS

Describes anything or anyone particularly good at wood-cutting or wood-boring.

36. XYRESIC

Means “razor-sharp.”

37. XYROPHOBIA

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The fear of being close to or touching sharp implements.

38. XYLANTHRAX

Nowhere near as nasty as it sounds, this is just an old name for what we now call charcoal.

39. XYSTUS

A type of covered walkway or portico.

40. X.Y.Z.

Late 19th century slang for a journalist who takes on any work going, or else 18th century slang for a dandyish or “exquisite” young man.

Take Advantage of Amazon's Early Black Friday Deals on Tech, Kitchen Appliances, and More

Amazon
Amazon

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.

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Sony

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Apple/Amazon

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How Did Black Friday Get Its Name?

Photo by Karolina Grabowska from Pexels
Photo by Karolina Grabowska from Pexels

When people emerge from residential hibernation the day after Thanksgiving, they pour into shopping centers. Consumers spent an estimated $68.9 billion over the holiday weekend in 2019, bolstering the bottom line for retailers like Walmart, Target, Best Buy, and online outlets.

If Black Friday is such a financial benefit, why is it called Black Friday? That modifier was usually reserved for cash-draining events like the Black Thursday that precipitated the 1929 stock market crash or the 1869 gold market collapse that led to financial ruin.

It turns out that the label didn’t always have the positive holiday spending connotation it enjoys today. Beginning in the 1950s, according to Snopes, employers and media began observing the trend of people calling in sick the day after Thanksgiving—traditionally not a paid holiday—to give themselves a four-day weekend. For businesses, that Friday was indeed bleak, as productivity slowed to a crawl. (Eventually, offices capitulated and gave employees the day off.)

Law enforcement also had reason to be disgruntled with that Friday. With everyone skipping work and kids off of school, traffic in major cities became a problem. Police in Philadelphia who were forced to deal with logjams and work mandatory shifts to cope with the congestion started to dread the day. Again, the “Black Friday” label seemed appropriate.

Eventually, this negative term spread to media and via word-of-mouth. Retailers in Philadelphia even tried to rephrase it to “Big Friday” to avoid the association with disaster. But it was Black Friday that stuck. It soon became synonymous with record profits, and the term was permanently adopted for the frenzied rush of shoppers using their day off to get their shopping done.

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